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Diffstat (limited to 'nsprpub/pr/tests/time.c')
| -rw-r--r-- | nsprpub/pr/tests/time.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/nsprpub/pr/tests/time.c b/nsprpub/pr/tests/time.c new file mode 100644 index 000000000..ed0bff8e9 --- /dev/null +++ b/nsprpub/pr/tests/time.c @@ -0,0 +1,169 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * Program to test different ways to get the time; right now it is tuned + * only for solaris. + * solaris results (100000 iterations): + * time to get time with time(): 4.63 usec avg, 463 msec total + * time to get time with gethrtime(): 2.17 usec avg, 217 msec total + * time to get time with gettimeofday(): 1.25 usec avg, 125 msec total + * + * + */ +/*********************************************************************** +** Includes +***********************************************************************/ +/* Used to get the command line option */ +#include "plgetopt.h" + +#include "nspr.h" +#include "prpriv.h" +#include "prinrval.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/time.h> + +#define DEFAULT_COUNT 100000 +PRInt32 count; + +time_t itime; +hrtime_t ihrtime; + +void +ftime_init() +{ + itime = time(NULL); + ihrtime = gethrtime(); +} + +time_t +ftime() +{ + hrtime_t now = gethrtime(); + + return itime + ((now - ihrtime) / 1000000000ll); +} + +static void timeTime(void) +{ + PRInt32 index = count; + time_t rv; + + for (;index--;) + rv = time(NULL); +} + +static void timeGethrtime(void) +{ + PRInt32 index = count; + time_t rv; + + for (;index--;) + rv = ftime(); +} + +static void timeGettimeofday(void) +{ + PRInt32 index = count; + time_t rv; + struct timeval tp; + + for (;index--;) + rv = gettimeofday(&tp, NULL); +} + +static void timePRTime32(void) +{ + PRInt32 index = count; + PRInt32 rv32; + PRTime q; + PRTime rv; + + LL_I2L(q, 1000000); + + for (;index--;) { + rv = PR_Now(); + LL_DIV(rv, rv, q); + LL_L2I(rv32, rv); + } +} + +static void timePRTime64(void) +{ + PRInt32 index = count; + PRTime rv; + + for (;index--;) + rv = PR_Now(); +} + +/************************************************************************/ + +static void Measure(void (*func)(void), const char *msg) +{ + PRIntervalTime start, stop; + double d; + PRInt32 tot; + + start = PR_IntervalNow(); + (*func)(); + stop = PR_IntervalNow(); + + d = (double)PR_IntervalToMicroseconds(stop - start); + tot = PR_IntervalToMilliseconds(stop-start); + + if (debug_mode) printf("%40s: %6.2f usec avg, %d msec total\n", msg, d / count, tot); +} + +int main(int argc, char **argv) +{ + /* The command line argument: -d is used to determine if the test is being run + in debug mode. The regress tool requires only one line output:PASS or FAIL. + All of the printfs associated with this test has been handled with a if (debug_mode) + test. + Usage: test_name -d + */ + PLOptStatus os; + PLOptState *opt = PL_CreateOptState(argc, argv, "d:"); + while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) + { + if (PL_OPT_BAD == os) continue; + switch (opt->option) + { + case 'd': /* debug mode */ + debug_mode = 1; + break; + default: + break; + } + } + PL_DestroyOptState(opt); + + PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); + PR_STDIO_INIT(); + + if (argc > 1) { + count = atoi(argv[1]); + } else { + count = DEFAULT_COUNT; + } + + ftime_init(); + + Measure(timeTime, "time to get time with time()"); + Measure(timeGethrtime, "time to get time with gethrtime()"); + Measure(timeGettimeofday, "time to get time with gettimeofday()"); + Measure(timePRTime32, "time to get time with PR_Time() (32bit)"); + Measure(timePRTime64, "time to get time with PR_Time() (64bit)"); + + PR_Cleanup(); + return 0; +} + + + |